lionheart yacht fuel capacity

Specification

Superyachts. Superyachts Data

LIONHEART Yacht

The LIONHEART yacht is a true symbol of luxury and elegance on the seas. With its stunning design and world-class amenities, it offers a unparalleled sailing experience for those who seek the finest.

The Stunning Ritz Carlton EVRIMA Yacht

Gliding Across Tokyo’s Sumida River: The Mesmerizing Zipper Boat

CROCUS Yacht: An 48 Meter Beauty by Admiral

PHI Yacht – Royal Huisman’s $45 Million Superyacht

• Zuretti Interior Design
• Zuretti Interior
• Zuccon International Project
• Ziyad al Manaseer
• Zaniz Interiors. Kutayba Alghanim
• Yuriy Kosiuk
• Yuri Milner
• Yersin Yacht

• Superyachts

LIONHEART Yacht – Enchanting $150M Superyacht

LIONHEART yacht is a 90-metre (295 ft) motor yacht built by Benetti in Italy. She was delivered in July of 2016 to the current owner who recently sold his brands Topshop and Selfridges, gaining him a net worth of US $2.4 billion.

LIONHEART features a sleek and modern design with space for up to 12 guests and 30 crew members. Her home berth lies in Monaco, which is where Green and his family spend most of their time.

LIONHEART yacht interior

The LIONHEART yacht features a lot of intricate details in its design that make her stand out from other comparable vessels on the market.

The interior of this yacht had exceptionally high-quality materials used in her construction, which gives her an elegant look and feel throughout all the different spaces on board. 

The design house Green & Mingarelli is responsible for the luxurious interior design of LIONHEART.

The LIONHEART yacht can welcome 12 guests in her six cabins as well as a crew of 30 members of staff. 

The interior of the yacht features a beach club, a beauty salon as well as expansive health and wellness facilities that include a spa, a hairdressing salon, a gym with a personal trainer, and a massage room with a masseur available at all hours.

The different floors of the yacht are connected by an elevator, and of course, the yacht has several pools, two of which are located on the upper decks. 

A grand staircase is situated in the center of the yacht, which gives the vessel the likeness of a luxury hotel. The interior is furnished with exclusive furniture with dark wood and cream upholstery.

The yacht features several sizable chandeliers and other extravagant lighting fixtures. Everything about the interior of LIONHEART is lavish and luxurious, flaunting the US $150 Million price tag that this incredible vessel bears.

Specifications

The LIONHEART yacht is 90 meters (296 ft) long with a beam of 14.4 meters (47.3 ft) and a draft of 7.5 meters (24.9 ft). She was built by Benetti Yachts in Livorno, Italy, and launched in 2016.

At the time, LIONHEART was Benetti’s flagship and the largest yacht they had ever produced, overtaking NABILA (later TRUMP PRINCESS owned by Donald Trump).

Her gross tonnage lies at 2,990 GT, reaching cruising speeds of 15 knots and maximum speeds of 16 knots.

She is definitely not the fastest yacht in her size category, but her caterpillar engines are reliable and robust.

LIONHEART has an immense aluminum superstructure, and her hull was constructed from premium steel. Her traditional teak decks nicely contrast her white exterior.

The LIONHEART yacht is values at US $150 million and has annual running costs of US $10-$15 Million. She is not currently available for charter or for sale, although Green’s other yachts are.

The exterior of the LIONHEART yacht was designed by Stefano Natucci, who was also responsible for LIONESS V, Green’s previous yacht by Benetti.

Natucci has designed a total of 45 yachts, the LIONHEART yacht being the largest of his past projects.

The yacht is fitted with a sophisticated stabilizer system that ensures a comfortable experience for guests when at anchor or underway. She has a total of four decks featuring generous outdoor spaces. 

The front of the bow has room for a small helipad where aircraft can land to pick up or drop off guests.

The top deck has an outdoor bar and jacuzzi, and behind the flybridge, there is a large pool.

All decks have luxurious outdoor seating with cream upholstery which is also the color of the crew uniforms aboard the LIONHEART yacht. 

At the aft, the yacht has a sizable beach club and extendable swimming platform where water toys can be launched.

She also has several smaller, shaded decks with ample space for dining or parties. On both her port and starboard sides, Lionheart has small balcony decks which are attached to two of the suites.

Toys and equipment

The LIONHEART yacht carries several tenders, although her most memorable is a VanDutch 55 named Lioncub.

This tender has a black and white photograph of a lion painted on its side, making it stand out from traditional tenders and attracting yacht spotters.

LIONHEART also has a Pascoe Limousine, a Pascoe Beachlande, and a Pascoe Outboard Shuttle giving her passengers a wide selection of transportation options for shore leave or excursions.

Although exact details aren’t known, the yacht carries a large number of water toys, including jet skis and water bobs.

With a large swimming platform at the back of the vessel and an attached beach club with a lounge area, a luxury that might be desired is available to her guests.

Additional information

Construction for LIONHEART began in 2012 after the owner Green commissioned his third yacht from Benetti .

The two previous vessels were also named LIONHEART but have since been renamed LUMIERE and LIONESS V. 

LUMIERE was built in 1999 and has a length of 49.9 meters (164 ft). Green sold her when he obtained LIONHEART V in 2006, and she is now available for charter.

LIONESS V has a length of 63.5 meters (208 ft) and was replaced by LIONHEART in 2016, 10 years after her launch. 

Interestingly all three vessels can welcome the same number of guests, and only their amenities and length changed over the years.

LIONESS V is still owned by the Green family, more specifically Tina Green. This yacht is available for charter.

Do you have anything to add to this listing?

• Benetti Design Team
• Green and Mingarelli Design
• Philip Green

Love Yachts? Join us.

Related posts.

SQUALL YACHT – Inside the Amazing Perini Navi Sailing Yacht

PANAKEIA Yacht – Opulence $15 M Superyacht

RARITY Yacht – Epic $23 Million Superyacht

SYNTHESIS Yacht – Stunning $100 Million Superyacht

• Yachts For Charter
• Luxury Yachts For Sale
• Find Yacht Brokers
• Yachting Destination Guides
• Superyacht Directory
• Superyacht News & Events
• Top 100 Yachts
• Yacht Builders
• Yacht Refit
• Naval Architects
• Exterior Designers
• Interior Designers
• Superyacht Fleet A-Z
• Luxury Yachts

Lionheart Yacht Specification

M/Y Lionheart

• Company Profile
• View Launched Yachts

Lionheart News

Lionheart is the first of a new breed of aluminium J-Class yachts, designed..

• Advertise with us
• Terms of Use
• User Conduct
• Registered Users
• Privacy Policy

©2009 Superyachts.com Ltd. All rights reserved.

©2011 Design Updated by Superyachts.com Ltd.

LIONHEART, THE BIGGEST BENETTI YACHT EVER BUILT

Leggi l’articolo in italiano

No official images of this yacht have been published, as desired by the owner (probably, a woman). We are talking about Lionheart, the biggest model never built by Benetti and the biggest yacht never built by a private yard in Italy. Following Lioness V (65 m), Lionheart is one of the most exclusive luxury charter boats in the world.

The photos you see in the article have been “stolen” by Livorno Oggi  and  Superyachtimes  (Karl Borg) on the occasion of the launch in Livorno and Malta (after all, it’s impossible not to see a 90-metre-boat…).

Lionheart  has a steel hull and aluminium deck and superstructures. The exterior design is the result of the collaboration with  Stefano Natucci , while interiors are designed by Green&Minarelli Design .

We don’t know much about this boat, except that she has four decks and she has a maximum and a cruising speed of 18 and 16 knots, respectively.

Benetti is working at 30 boats at the moment; among them, a 107-metre-yacht which will be launched in 2019.

In the history of the yard, Lionheart beats the length record of  Nabila (1980).

Leave a Reply Cancel reply

Your email address will not be published.

Save my name, email, and website in this browser for the next time I comment.

You might be interested in

Ocean Alexander 35P, the Puro Series has been launched

Ocean Alexander 32 Legend: evolution makes it better than ever

S/Y MAVI’: Ice 70 No. 4 launched

How the Sharp and Spacious Absolute FLY Has Taken the States by Storm?

ZAR 85 SPORT LUXURY: THE ZAR FORMENTI’S SPORTS FUTURISTIC FLAGSHIP

MAY DAY, MAY DAY… I RAN OUT OF FUEL

To provide the best experiences, we and our partners use technologies like cookies to store and/or access device information. Consenting to these technologies will allow us and our partners to process personal data such as browsing behavior or unique IDs on this site and show (non-) personalized ads. Not consenting or withdrawing consent, may adversely affect certain features and functions.

Click below to consent to the above or make granular choices. Your choices will be applied to this site only. You can change your settings at any time, including withdrawing your consent, by using the toggles on the Cookie Policy, or by clicking on the manage consent button at the bottom of the screen.

Subscribe For Latest Updates

Sign up to receive the best of Yachting News, sea trials, boat review and world premieres .

The only ADVERTISING FREE newsletter

Yachting Monthly

• Digital edition

How it works: all about a yacht’s fuel system

• Callum Smedley
• October 27, 2023

Diesels Afloat co-author Callum Smedley takes a detailed look at the workings of a yacht's fuel system

A yacht’s fuel system comprises everything from the boat’s fuel tank to the engine’s fuel injector or injectors. There are two distinct parts of the fuel system: that installed by the boatbuilder and that attached to the engine. The tank, primary filter and all the pipework to and from the engine are designed and installed by the boatbuilder. From the lift pump onwards, it’s a complete unit from the engine manufacturer.

On older boats, you may find modifications to this part of the system, so investigate yours thoroughly to see if you need to bring it up to scratch. One of the biggest problems is leaking pipes, usually caused by vibration. Generally, however, apart from routine servicing and wear and tear, there should be little trouble from the fuel system. The main job is to simply supply the engine with clean and water-free fuel.

The fuel itself is a hydrocarbon that mainly comes from crude oil. We usually call it diesel oil or ‘red diesel’ (with no duty to pay), but its proper name is marine gas oil. Apart from having red dye added to it, to identify that it is duty-free, marine fuel is very similar to road diesel fuel, often called ‘white diesel’ (on which duty must be paid), used in cars, lorries and buses.

Your boat’s diesel engine will run perfectly fine on either fuel, but white diesel contains biodiesel which can clean out your fuel system due to its higher solvent content. Cleaning out the fuel system may sound good, but the dirt released has to go somewhere, so it ends up in the fuel filters. The fuel filters will remove the dirt effectively but it means they will have to be changed much more often. In any case, it’s always a good idea to carry extra filters on board.

Copper pipework

The pipework in a yacht’s fuel system is most often made from copper. However, over time it can become hardened and brittle, especially if it isn’t supported or clipped properly to the vessel, making it much more likely to crack, which, in turn, can lead to a loss of fuel into the bilges or the pipework failing completely. Fuel in the bilges is never a good idea, because of fire and pollution. If the fuel piping was to fail completely the engine would stop, and it shouldn’t be re-started until a full repair is carried out with the system completely bled of air – one reason why commercial vessels are now starting to use stainless steel pipes.

Flexible pipework

When an engine is mounted on flexible mounts, flexible fuel pipework (hoses) should be used, and it’s vital that the correct grade of hose is used. The suitable grades are;

BS EN 853 rubber covered wire braided reinforced hydraulic type BS EN 856 rubber covered spiral wire reinforced hydraulic type ISO 7840 fire-resistant flexible oil fuel hose.

Normally, there will be text on the hose indicating that it is suitable for fuel.

Enjoyed reading this?

A subscription to Yachting Monthly magazine costs around 40% less than the cover price .

Print and digital editions are available through Magazines Direct – where you can also find the latest deals .

YM is packed with information to help you get the most from your time on the water.

• Take your seamanship to the next level with tips, advice and skills from our experts
• Impartial in-depth reviews of the latest yachts and equipment
• Cruising guides to help you reach those dream destinations

Follow us on Facebook , Twitter and Instagram.

Please use a modern browser to view this website. Some elements might not work as expected when using Internet Explorer.

• Landing Page
• Luxury Yacht Vacation Types
• Corporate Yacht Charter
• Tailor Made Vacations
• Luxury Exploration Vacations
• View All 3570
• Motor Yachts
• Sailing Yachts
• Classic Yachts
• Catamaran Yachts
• Filter By Destination
• More Filters
• Latest Reviews
• Charter Special Offers
• Destination Guides
• Inspiration & Features
• Mediterranean Charter Yachts
• France Charter Yachts
• Italy Charter Yachts
• Croatia Charter Yachts
• Greece Charter Yachts
• Turkey Charter Yachts
• Bahamas Charter Yachts
• Caribbean Charter Yachts
• Australia Charter Yachts
• Thailand Charter Yachts
• Dubai Charter Yachts
• Destination News
• New To Fleet
• Charter Fleet Updates
• Special Offers
• Industry News
• Yacht Shows
• Corporate Charter
• Finding a Yacht Broker
• Charter Preferences
• Questions & Answers
• Add my yacht

NOT FOR CHARTER *

This Yacht is not for Charter*

SIMILAR YACHTS FOR CHARTER

View Similar Yachts

Or View All luxury yachts for charter

• Luxury Charter Yachts
• Sailing Yachts for Charter
• Amenities & Toys

LIONHEART yacht NOT for charter*

43.4m  /  142'5 | claasen shipyards | 2010 / 2020.

Owner & Guests

• Previous Yacht

Special Features:

• ABS (American Bureau of Shipping) ✠A1, Yachting Service classification
• Award winning
• Sleeps 8 overnight

The award winning 43.4m/142'5" sail yacht 'Lionheart' was built by Claasen Shipyards in the Netherlands and she was delivered to her owner in August 2010. This luxury vessel's exterior design is the work of Hoek Design and she was last refitted in 2020.

Guest Accommodation

Lionheart has been designed to comfortably accommodate up to 8 guests in 4 suites.

Range & Performance

Lionheart is built with a aluminium hull and aluminium superstructure, with teak decks. She was built to ABS (American Bureau of Shipping) ✠A1, Yachting Service classification society rules.

*Charter Lionheart Sail Yacht

Sail yacht Lionheart is currently not believed to be available for private Charter. To view similar yachts for charter , or contact your Yacht Charter Broker for information about renting a luxury charter yacht.

Lionheart Yacht Owner, Captain or marketing company

'Yacht Charter Fleet' is a free information service, if your yacht is available for charter please contact us with details and photos and we will update our records.

Lionheart Photos

Lionheart Awards & Nominations

• The ShowBoats Design Awards 2011 Interior Layout Award: Sailing Yachts Winner
• The World Superyacht Awards 2011 Best Sailing Yacht in 30m to 44.99m size range Finalist
• The ShowBoats Design Awards 2011 Naval Architecture Award: Sailing Yachts Finalist

NOTE to U.S. Customs & Border Protection

Specification

S/Y Lionheart

SIMILAR LUXURY YACHTS FOR CHARTER

Here are a selection of superyachts which are similar to Lionheart yacht which are believed to be available for charter. To view all similar luxury charter yachts click on the button below.

40m | Konjo Boat builders

from $55,300 p/week

Alila Purnama

46m | Custom

from $87,500 p/week

Aristarchos

40m | Nautor's Swan

from $81,000 p/week ♦︎

47m | Hodgdon Yachts

from $96,000 p/week ♦︎

39m | Claasen Shipyards

from $84,000 p/week

40m | Costruzioni Navali Tigullio

from $92,000 p/week ♦︎

BAHRIYELI D

42m | Custom

from $16,000 p/week ♦︎

41m | Custom

from $36,000 p/week ♦︎

45m | Perini Navi

from $150,000 p/week

43m | Custom

from $38,000 p/week ♦︎

Cakiryildiz

43m | East Yachting

from $43,000 p/week ♦︎

Carpe Diem V

47m | Carpe Diem

from $34,000 p/week ♦︎

As Featured In

The YachtCharterFleet Difference

YachtCharterFleet makes it easy to find the yacht charter vacation that is right for you. We combine thousands of yacht listings with local destination information, sample itineraries and experiences to deliver the world's most comprehensive yacht charter website.

San Francisco

• Like us on Facebook
• Follow us on Twitter
• Follow us on Instagram
• Find us on LinkedIn
• Add My Yacht
• Affiliates & Partners

Popular Destinations & Events

• St Tropez Yacht Charter
• Monaco Yacht Charter
• St Barts Yacht Charter
• Greece Yacht Charter
• Mykonos Yacht Charter
• Caribbean Yacht Charter

Featured Charter Yachts

• Maltese Falcon Yacht Charter
• Wheels Yacht Charter
• Victorious Yacht Charter
• Andrea Yacht Charter
• Titania Yacht Charter
• Ahpo Yacht Charter

Receive our latest offers, trends and stories direct to your inbox.

Please enter a valid e-mail.

Thanks for subscribing.

Search for Yachts, Destinations, Events, News... everything related to Luxury Yachts for Charter.

Yachts in your shortlist

Claasen Shipyards

Lionheart, completed by Claasen in 2010, was the first J-class yacht with an aluminium hull. With a length of 43.40 metres, she was also the largest so far, although she is due to be surpassed by the SVEA project currently being built by Vitters Shipyard.

Lionheart is designed for cruising as well as racing, and is therefore built to MCA. No expense has been spared to ensure that she is competitive on the race course, and her performance has been optimised by a design that incorporates research done on previous J-class yachts.  Lionheart ’s hull is built in high tensile Alustar plating and extrusion materials, and she employs longitudinal stringers to ensure maximum stiffness.

Tremendous 17-metre overhangs lend Lionheart a striking appearance. She features two deckhouses and two cockpits, with one of each reserved for the owner, and the owners’ cockpit linked to their suite for maximum privacy.

Master Cabin

• Type of yacht J Class
• Name Lionheart
• Naval architect Hoek Design Naval Architects B.V.
• Design & styling Hoek Design Naval Architects B.V.
• Interior styling Hoek Design Naval Architects B.V.
• Owner's repr. MCM Newport
• MAIN DIMENSIONS
• LOA 43.40 m
• LWL 26.52 m
• Beam 6.55 m
• Draft 4.57 m
• Ballast 71 ton
• Draft (min) N/A
• Displacement 182 ton
• BASIC SPECS
• Hull Material Full aluminium
• Rigging Fractional cutter rigged sloop
• Spars Builder Hallspars
• Spars Carbon
• Superstructure Aluminium
• Classification A1+ MCA LY2
• Engine brand & type Volvo D9 MH
• Engine HP 413
• Shaft & propellor Hundested VP-5
• Gearbox MG-5082 SC
• Bow/stern Thruster Lewmar
• Generators Kohler
• Water tank capacity 4000 L
• Fuel tank capacity 9300 L
• Sails North Sails
• Upwind m2 961
• Downwind m2 1500
• Lionheart triumphs at inaugural World J-Class Championship 29 augustus, 2017
• Lionheart on a roll 24 juli, 2017
• She’s done it! Lionheart wins the America’s Cup J Class Regatta 21 juni, 2017

Press publications

No downloads for this yacht

• View brochure online
• Download brochure

I WOULD LIKE TO RECEIVE MORE INFORMATION

If you’d like more detailed information about our yachts, from brochures to specs, from videos to media articles, the Claasen team is at your service. Simply click on the link below and fill in your details… We’ll take care of the rest!

To inquire form

• Azimut | Benetti Group

[ Full Custom ]

FB262 M/Y Lionheart

EXPLORE the EXTERIOR

Via Michele Coppino, 104

55049 – Viareggio (Lucca)

Tel +39 0584 3821

Fax +39 0584 396232

[email protected]

Via Edda Fagni, 1

57100 – Livorno, Italy

Tel: +39 0586 415600

Fax: +39 0586 834053

Sebastiano Fanizza [email protected]

Nicholas Bischoff +1 616 8013686 [email protected]

Marco Nuovo +1 954 7027819 [email protected]

Toby Walker +44 7788 925337 [email protected]

Christos Ramnialis +39 347 6224852 [email protected]

Batuhan Tarim +39 342 990 8408 [email protected]

Roberto Corno +39 334 6607395 [email protected]

Oscar Romano +39 366 6546171 [email protected]

Nabil El Jammal +39 333 3527508 +971 555524852 [email protected]

Peter Mahony +852 5190 0373 [email protected]

Andrea Moschese +39 334 6670159 [email protected]

Remember Me

Find anything, super fast.

• Destinations
• Documentaries

We don't have any additional photos of this yacht. Do you?

Lionheart Specifications

• Name Lionheart
• Model Custom
• Hull NB FB233
• Hull Colour -
• Naval Architect Benetti
• Exterior Designer Stefano Natucci
• Interior Designer Stefano Natucci
• Length Overall 63.0m
• Length at Waterline -
• Draft (min) -
• Draft (max) 3.6m
• Gross Tonnage 1389
• Cabins Total 6
• Hull Configuration -
• Hull Material Steel
• Superstructure -
• Deck Material Teak
• Fuel Type Diesel
• Manufacturer Caterpillar
• Model 3516B
• Total Power -
• Propulsion Twin Screw
• Max Speed 16 Kn
• Cruising Speed 14 Kn
• Fuel Capacity -
• Water Capacity -
• Generator -
• Stabilizers -
• Thrusters -
• Amenities -
• Yacht Builder Benetti View profile
• Naval Architect Benetti View profile
• Exterior Designer Stefano Natucci No profile available
• Interior Designer Stefano Natucci No profile available

Yacht Specs

Other benetti yachts, related news.

Yacht, IMO 1012323

• VesselFinder
• Miscellaneous

The current position of LIONHEART is at North West Atlantic Ocean reported 2 mins ago by AIS. The vessel is sailing at a speed of 0.1 knots. The vessel LIONHEART (IMO 1012323, MMSI 249613000) is a Yacht built in 2016 (8 years old) and currently sailing under the flag of Malta .

Position & Voyage Data

Map position & weather, recent port calls, vessel particulars.

LIONHEART current position and history of port calls are received by AIS. Technical specifications, tonnages and management details are derived from VesselFinder database. The data is for informational purposes only and VesselFinder is not responsible for the accuracy and reliability of LIONHEART data.

Your Head Start Gift! Kickstart Your Explorer Yacht Journey By Understanding How To Work With Your Shipyard. FREE DOWNLOAD

• Jul 5, 2021

Yacht Fuel and Water Tank Capacities

Updated: Feb 10, 2023

The time has come for us to review fuel and water tank capacities on Vanguard. We were spurred by adding a unique need for Water/Glycol cooling systems required by the hybrid drive. So to kick this off, we looked at a few similar hulls to get a better feel for what the market is looking for:

1 – first off, we looked at other high L/B ratio hulls, specifically FPB78 and XPM78-01. These were both the same length but differed in their beam and internal layout, 3 and 2 cabin designs. (Design details for the Circa Marine 24M are not easy to find).

2 – then, we looked at another displacement hulls with three cabins and similar internal volume – Nordhavn 64 , single-engine, and Bering 65 twin-engine. 

Explorer Yacht Tank Volumes

3 – we looked at semi-planing hulls of similar layout and internal volume. Twin-engine Fleming 65 and Ocean Reef . Table 1 below displays the results for fuel and water tank storage capacities across different yacht brands. What is immediately apparent is the installed power with FPB78 and XPM78 series being significantly lower for a similar speed profile to the two other displacement hulls of Nordhavn and Bering. Even more so for the semi-planing hulls. Conversely, FPB78 and XPM78 have significantly higher freshwater tank capacities. This capacity is partly as a ballast function (see fuel tank capacities) and party to reflect their passage-making profile where convenient marina facilities are far and long apart. 

Grey and Black Water

Grey and blackwater tank capacities were a little harder to find. Greywater is easier to deal with and, in most cases, can be discharged overboard unless in environmentally sensitive areas and some freshwater lakes. Discharge may become more restrictive as the legislation progresses, so we decided to install these tanks for all shower and sink drains. We will probably lead HVAC drains overboard. Blackwater is subject to pump-out requirements at marina facilities or defined distance offshore, typically 3 miles. We split our tank capacity 50% Grey, 50% black. Greywater can overflow to black if necessary but not the other way around. Greywater tanks will be marine-grade aluminum hull tanks; black water will be polypropylene fabricated tanks to limit corrosion. Eight hundred liters capacity for each seems in line with the other 3-cabin yachts irrespective of hull design. We will create an interlock in the Helm Station mimic diagrams to prevent unwanted discharge in restricted waters and install remotely operated valves in the system. 

Yacht Fuel Tanks

We looked at the fuel tanks. In considering these it is also necessary to consider installed power on each vessel. We estimated operational engine power as 60% of installed capacity except for the high L/B hulls where the second engine provides redundancy and is not power. At 60% power, we assume that the higher-powered hulls are not yet planing.  Tanks on Vanguard are smaller than XPM78-01 with similar hydrodynamic power needs and FPB78 with a slightly wider hull. However, the range remains about 7000 NM with 20% reserve , and we do not feel the need to increase this. The one change we would like to see is a reduction in the volume of the day tanks. Three-day capacity is ample, and we would like to remove a little weight from the stern of the hull and add a little more space in the engine room.  

Yacht Water Tanks

Then we looked at water storage tanks. Some of this capacity is designed as ballast compensation to keep trim as the fuel reduces. Vanguard will have an onboard water maker additional to any shore supply. We decided to retain the large water storage capacity, it adds redundancy should the water maker fail and we will need the ballast capacity to counterbalance the fuel tanks as they deplete.

Hybrid Drive Yacht Cooling System

Like many EV’s, our cooling will use ethylene glycol in a 50/50 mixture. That gives excellent heat transfer performance, low freeing temperatures, and corrosion protection for any metal it touches. Due to its toxicity, the imperative is to keep it isolated from any potable water tanks and systems that minimize accidental contamination risks. Water/Glycol system could cool the batteries, inverters, EV Motors, hybrid drive gearbox, and main gearbox. Engines themselves have antifreeze coolant systems that we will leave as supplied. 

XPM78-02 – Vanguard Tank Storage Plan

Space exists in the engine room bilge between and aft of the engines. Three frames will allow for a cofferdam aft of the freshwater tanks. Seawater in contact with the bottom skin area of the tank will cool the contents and (less efficiently) internal air contact. Being set low in the hull, any systems not operating will drain to the sump tank removing toxic ethylene glycol from the lines when possible. 

By eliminating seawater, we eliminate corrosion and fouling. We can also consider fitting third-party sealed plate coolers instead of traditional tube coolers with corresponding weight and size reductions. The engine cooling system can remain independent as there is a wet exhaust system installed so we cannot eliminate the seawater flow.  

I’d be a little nervous about this idea if the systems were either high-powered or continuously running. Apart from the engines, the operation is periodic, in the order of 1 or 2 hours. For all systems, the cooling requirements are pretty modest, in the order of a few kW. We still need to undertake a heat balance for the system to double-check, but I think we are good (see later Blog). The fallback is to add a parasitic seawater cooler into the system, which we would rather avoid right now. 

Conclusion for Fuel and Water Tank Capacities

So the final design has:

retained most fuel and water tank capacities and their effect on trim and stability.  

class-leading fuel range at >7000miles @ 10kn

more potable water/ballast than you need to fill a small swimming pool

ample greywater, and blackwater capacity.  

a nifty, passive water/glycol cooling system suitable for high latitude operation, removing most seawater systems from the engine room. 

Items 1 through 4 came at no effort thanks to work already undertaken for hull number 1 Mobius. Item 5 is our add-on to that configuration. 

Read also: Aluminium, Fibreglass, Steel or Wooden Hulls?

Read also: Explorer Yacht, Electrical System Design

• Building Vanguard
• Yacht Equipment

Recent Posts

Propellers - Vibration and a Solution?

Weekly Update - Drives Reveal Big Problems

Weekly Update - Marine Insurance - A Difficult Ask for an Explorer Yacht